Consanguineous (adj)
kon-san-gwin-ee-us
Relating to or denoting people descended from the same ancestor. A blood relation.
Early 17th century: from Latin consanguineus ‘of the same blood’ (from con- ‘together’ + sanguis ‘blood’) + -ous.
Example sentences
“Consanguineous marriages can cause problems with recessive conditions.”
“We are related but by marriage, we’re non consanguineous cousins.”